MCP41100T-E/SN

Digital Potentiometers Overview

The MCP41100T-E/SN is a single-channel, volatile digital potentiometer manufactured by Microchip Technology. It features an end-to-end resistance of 100 kΩ with 256 linear taps controlled via an SPI serial interface. The device operates on a single supply voltage ranging from 2.7V to 5.5V and supports industrial temperature ranges up to +85°C or extended ranges up to +125°C. Key electrical characteristics include ±1 LSB maximum Integral and Differential Non-Linearity (INL & DNL), a typical wiper resistance of 175 Ω at VDD = 5.5V, and a static supply current of less than 1 µA. It is housed in an 8-pin SOIC package.

Digital Potentiometers Feature Summary

• Single-channel digital potentiometer with 100 kΩ nominal resistance and 256 linear tap positions.
• SPI serial interface supporting Mode 0,0 and Mode 1,1 for wiper position control.
• Low power consumption with <1 µA static supply current and software shutdown capability.
• High precision linearity with ±1 LSB max INL and DNL specifications.

Digital Potentiometers Applications

• Programmable gain amplifiers and signal conditioning circuits.
• Audio equipment volume and tone control applications.
• Servo motor speed and position control systems.
• Battery charging current regulation and power supply adjustments.
• LCD contrast bias voltage adjustment.

Digital Potentiometers Procurement Notes

Verify the specific suffix 'E' indicates the extended temperature range (-40°C to +125°C) rather than the standard industrial range. Confirm the 'SN' designation corresponds to the 8-lead Small Outline Integrated Circuit (SOIC) package type. Ensure the order quantity matches the manufacturer's minimum packaging requirements for tape and reel configurations.

Digital Potentiometers Selection Notes

Select this component when a single-channel, high-resistance (100 kΩ) digital potentiometer is required. The 100 kΩ version offers a lower -3dB bandwidth (approx. 145 MHz) compared to lower resistance variants; verify if this meets the application's frequency response needs. Consider the MCP41100 only if volatile memory behavior upon power loss is acceptable, as it lacks non-volatile storage.

Digital Potentiometers Part Context

This part belongs to the MCP41XXX family of single-channel digital potentiometers. It shares the same core architecture and pinout compatibility as other members like the MCP41010 (10 kΩ) and MCP41050 (50 kΩ). The primary differentiator is the end-to-end resistance value, which affects the wiper resistance and bandwidth characteristics while maintaining identical control logic and interface protocols.

Digital Potentiometers Replacement Considerations

Direct functional replacements within the same package and interface include the MCP41010T-E/SN and MCP41050T-E/SN, provided the resistance tolerance aligns with circuit requirements. Cross-family alternatives may require level shifting or logic inversion depending on the SPI mode configuration.